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8a64b46a2f
Log merge completions were spliced in one server commit. It's possible to get enough completion work pending that it all can't be completed in one server commit. Operations fail with ENOSPC and because these changes can't be unwound cleanly the server asserts. This allows the completion splicing to break the work up into multiple commits. Processing completions in multiple commits means that request creation can observe the merge status in states that weren't possible before. Splicing is careful to maintain an elevated nr_complete count while the client can't get requests because the tree is rebalancing. Signed-off-by: Zach Brown <zab@versity.com>
Introduction
scoutfs is a clustered in-kernel Linux filesystem designed to support large archival systems. It features additional interfaces and metadata so that archive agents can perform their maintenance workflows without walking all the files in the namespace. Its cluster support lets deployments add nodes to satisfy archival tier bandwidth targets.
The design goal is to reach file populations in the trillions, with the archival bandwidth to match, while remaining operational and responsive.
Highlights of the design and implementation include:
- Fully consistent POSIX semantics between nodes
- Atomic transactions to maintain consistent persistent structures
- Integrated archival metadata replaces syncing to external databases
- Dynamic seperation of resources lets nodes write in parallel
- 64bit throughout; no limits on file or directory sizes or counts
- Open GPLv2 implementation
Community Mailing List
Please join us on the open scoutfs-devel@scoutfs.org mailing list hosted on Google Groups